"Physics" is a term applied to games with scant regard for the sort of thing we were learning in Mr Dick's class back in school. We're suddenly not talking about Hooke's Law or drawing patterns in iron filings but, if memory serves correct, there was something about water tanks.

And the movement of water is something of a mobile gaming hit, following the success of Where's My Water? Today's App of the Day might not have us as excited as our adventures with the crocs in Disney's title, but it's still a lot of fun.

Sprinkle

In Sprinkle you play a fire fighter, equipped with a fire-fighting truck. This carries a hose and arm, which will squirt water on demand at the press of a button.

The aim of the game is simple, all you have to do is put out the fires burning in the scene laid out before you. There's a limited supply of water, so you can't just hold down the button and spray it all out. You have to think about it.

And thinking about it is what makes Sprinkle such a clever game, because each scene presents a number of challenges: swinging arms, tunnels, ramps and so on.

At this point we come back to physics and the reference to Where's My Water, because you have to figure out the best way to spray the water around the environment to reach all the fires and stop the houses burning down.

You'll have to alter the angle of the spray as you play, as well as dealing with various other elements within the game, such as moving blocks, rolling boulders and so on.

It's not easy, but like many such games of this ilk, after a little practice you soon learn how the water will behave and avoid some of the pitfalls awaiting you. Of course, sometimes, you'll have to play levels over and over to get a successful result.

Like many other puzzlers of this type there is a rating system giving the levels a degree of replayability.

There are 72 levels for you to play through in the paid version, which will set you back £1.59. A demo version, called Sprinkle free is also available. We're sure you'll be happy to pay the princely sum for the full game, as it's very well made and executed.